@misc{cryptoeprint:2009:094,
    author = {Sugata Gangopadhyay, Sumanta Sarkar, Ruchi Telang},
    title = {On the Lower Bounds of the Second Order  Nonlinearity of some Boolean Functions },
    howpublished = {Cryptology ePrint Archive, Report 2009/094},
    year = {2009},
    url = {http://eprint.iacr.org/2009/094},
}